C-02 — Communication Systems and Networking

What is the process of imparting or exchanging information through a person or machine called?

Which modes of communication did human beings use first, before inventing languages?

Radio and television are examples of which type of communication?

In the current age, with internet and cellular technology, human beings can now communicate not only with themselves but also with —

Data communication is best described as —

In a data communication system, what converts data from the source into an electric (or light) signal?

Which device sends the signal from the input transducer to the medium?

The intermittent unexpected electrical signals that may be added to the medium during transmission are called —

Which of the following is an example of a Source component (data source + input transducer)?

Which of the following is an example of a Transmitter in data communication?

Which of the following is used as a Medium in data communication?

Consider the following components of data communication: Which of the following is correct?

What does bandwidth essentially denote?

In which unit is bandwidth usually calculated?

How many bits are there in 1 Byte?

1 Mbps equals how many bits per second?

According to the text, 1 MBps is equal to —

The bandwidth of a communication network depends on —

Which medium can provide much more bandwidth than a telephone cable?

Data transmission methods are divided into two types based on bit distribution. These are —

Which transmission method sends one bit at a time into one medium?

In parallel data transmission, what is used alongside data lines to synchronise transmitter and receiver?

Why is parallel transmission considered the more natural way to transmit data inside a computer?

Which transmission method is NOT ideal for long distance data transmission?

Which port uses the serial data transmission method?

Why is serial transmission viewed as a reliable data transmission method?

Consider the following statements about parallel and serial transmission: Which of the following is correct?

What is bit synchronization?

In serial transmission, a bit is transmitted and received with each —

Depending on bit synchronization, serial data transmission is classified into how many types?

In asynchronous transmission, data is transferred in which format?

In asynchronous transmission, 1 character equals how many bits?

What does the transmitter send prior to sending data so the receiver knows transmission has started?

Why does asynchronous transmission NOT need a primary storage device like RAM or Cache?

Which device uses asynchronous data transmission due to undetermined time between key presses?

In synchronous transmission, the receiver station divides the data characters into —

In synchronous transmission, which signal is used by the receiver machine to synchronize its clock with the transmitter?

Which signal denotes the end of a block and sometimes contains error correction information?

Which networks typically use synchronous data transmission for long distances with larger bandwidth?

Consider the following statements about synchronous transmission: Which of the following is correct?

Isochronous transmission is a cross between which two transmission types?

Which real-time applications use isochronous transmission?

Consider the following about isochronous transmission: Which of the following is correct?

Data transmission mode refers to the mechanism that denotes —

In which mode is the transmission flow one directional only?

Which of the following is an example of simplex communication mode?

In half duplex mode, data transmission —

Which of the following operates in half duplex mode?

In which mode can both devices simultaneously transmit and receive data?

Which of the following is an example of full duplex mode?

In unicast mode, one transmitter communicates with —

Broadcast mode can only operate in which transmission mode?

Which of the following is an example of broadcast mode?

How does multicast mode differ from broadcast mode?

Which of the following are examples of multicast mode?

Consider the following statements: Which of the following is correct?

The channels used to exchange data between a transmitter and receiver are known as —

Which of the following is a Guided (wired/cable) medium?

Which of the following is an Unguided (wireless) medium?

Bluetooth is used to make which type of network?

Wifi is used to make which type of network?

Which materials are used as the conductor medium in wired cable media?

How is a twisted pair cable made?

Twisted pair cables can be of which two types?

Up to what distance can twisted pair cables transmit data?

Depending on the category, the bandwidth of twisted pair cables ranges from —

Twisted pair cables are generally used in —

How many layers are inside a coaxial cable?

In a coaxial cable, what is located at the center?

Why is a coaxial cable called "coaxial"?

Compared to twisted pair cables, coaxial cables provide —

Coaxial cables are particularly used in —

Thinnet (10BASE-2) cable can transmit data up to what distance without repeaters?

What is the data rate of thinnet (10BASE-2) cable?

A repeater is a device that —

Thicknet (10BASE-5) cable can transmit data up to what distance?

A fiber-optic cable contains one or more fibers made of which material to carry light?

Optical fiber cables are incredibly transparent to which range of light?

In an optical fiber cable, the part where the refraction index is the highest is called the —

In an optical fiber cable, the part where the refraction index is the lowest is known as —

Light travels through an optical fiber cable based on the principle of —

What is the diameter of an optical fiber?

If the core diameter of an optical fiber is between 8 and 12 microns, it is called —

Single mode fibers are used for —

If the core diameter of an optical fiber is between 50 to 100 microns, it is —

Why are single mode fibers more expensive than multi mode fibers?

Why is laser light preferred over LED light for long distance optical fiber communication?

The invention of fiber amplifiers for which laser made that wavelength widely used for long distance communication?

Exchange of information between two devices through electromagnetic waves without wires is known as —

In the electromagnetic spectrum, what happens as the frequency of a wave increases?

Which two portions of the electromagnetic spectrum have played key roles in modern communication?

Radio waves are generally classified as having frequencies between —

Why are radio waves more commonly used for broadcasting?

The antenna used to transmit a radio signal has to be how much of the length of the signal's wavelength?

Radio waves can transmit signals from one part of the earth to another because they are —

Microwaves are generally classified as having frequencies between —

Unlike radio waves, microwaves —

Microwave communication is of which two types?

In terrestrial microwave communication, a relay or repeater station is placed after every —

A satellite placed approximately 36000 km above ground that circles the earth at the same speed of its rotation is called a —

VSAT stands for —

Which is a geostationary satellite mentioned in the text?

Consider the following about terrestrial and satellite microwave communication: Which of the following is correct?

Which modern invention connects electronic devices, sensors and home appliances through a network for central command and information exchange?

A smart wristband that sends your pulse rate and walking speed to your smartphone is an example of a —

Bluetooth is a technology used to communicate wirelessly between two devices over —

The Bluetooth network is which type of network?

At what frequency does the Bluetooth network work?

What is the range of a Bluetooth network?

A Bluetooth network is also known as —

A piconet can contain a maximum of how many devices?

Multiple piconets can form a network called a —

Consider the following statements about Bluetooth: Which of the following is correct?

Wi-Fi is the short form of —

The word Wi-Fi is trademarked by which organization?

Between which frequencies does a Wi-Fi network usually operate?

What is the coverage area of a Wi-Fi network?

Why does Wi-Fi have an obvious issue of security?

WiMax is the short form of —

WiMax is being used widely instead of which connection for internet services?

Between which frequency range does WiMax technology operate?

What is the data transmission rate of WiMax?

WiMax has two components. One is the receiver with antenna; the other is the —

Each WiMax base station has a coverage area of —

How does WiMax differ from Wi-Fi regarding installation?

According to Table 2.2, which IEEE standard corresponds to Bluetooth?

According to Table 2.2, which IEEE standard corresponds to Wi-Fi?

According to Table 2.2, which IEEE standard corresponds to WiMax?

Consider the following from Table 2.2: Which of the following is correct?

According to Table 2.2, what is the range of WiMax?

Wireless communication between mobile or stationary devices at a distance is called —

To establish a mobile or cellular network, an area is divided into multiple —

When a user makes a call, which station determines the receiving base station of the receiver?

Why are mobile phones called cellular phones?

Mobile phones were first used by whom in 1940 during the second world war?

Which company began commercially manufacturing mobile phones in the 80s?

Commercially manufactured mobile phones can be divided into how many generations?

Which was the first handheld mobile phone, manufactured and used in the United States?

AMPS, which announced the first generation of mobile phone standards, stands for —

The first generation (1G) of mobile phones covered which time period?

What marked the beginning of the second generation (2G) of mobile phones?

A 2G network is also known as a —

The two new features of 2G mobile phones were GSM and —

When a mobile phone communicates beyond its service operator's coverage area, it is called —

Third generation (3G) of mobile phones replaced circuit switching with which data transmission method?

In 3G, the data transfer rate increased up to —

Which of the following is one of the new standards brought by 3G mobile phones?

Which services were the main outcomes of the third generation of mobile phones?

Fourth generation (4G) of mobile phones operates in which standards?

In 4G, mobile devices can get data transfer rates up to —

According to the text, 4G is at least how many times faster than 3G?

The fifth generation (5G) networking system is being called the —

Which of the following is a fifth generation (5G) standard gaining popularity?

Consider the following statements about mobile generations: Which of the following is correct?

The communication and data transfer methods of two or more computing devices jointly is called —

A computer network is best defined as —

What is the main purpose of establishing a network between two or more devices?

The Internet is the best example of which type of resource sharing?

In banking, everyone using different computer terminals but the same software suites through networking is an example of —

Using a single network printer where all devices send print commands to it is an example of —

Computer networks can be classified based on topography, ownership, and —

Depending on topography (geographical location), computer networks are classified into how many types?

The home network an individual builds around his computer connecting printers, phones and cameras is a —

What is the coverage span of a Personal Area Network (PAN)?

Using repeaters, the range of a LAN can be increased to a maximum of —

Which topologies can a LAN have?

A Campus Area Network (CAN) is made of —

What is the coverage range of a Campus Area Network (CAN)?

A Metropolitan Area Network (MAN) can have a coverage area of up to —

If the devices inside a MAN are connected via wireless media, it is called a —

Which is the prime example of a Wide Area Network (WAN)?

A peer to peer network works —

Which network contains two or more client stations and a centralised server station?

In a centralised network, the single centralised server is called the —

A type of network that connects multiple workstations, shared storage devices and I/O devices is a —

A hybrid network is a combination of —

Based on ownership, a network with no restriction on users that any device can join or leave anytime is a —

In a private network, a new user wishing to join needs access permission from the —

Consider the following statements: Which of the following is correct?

The word Modem is the short form of —

What does a modem do?

Which characteristic best describes a Hub?

Which device has replaced Hubs in computer networking systems?

How does a switch avoid collision, unlike a hub?

How many ports can switches have?

Which device can connect two or more networks with the same protocol and determine the shortest path for data?

Routers can connect multiple LANs to create a —

What is a limitation of a router?

Which device is used to connect two networks with different protocols?

A gateway is also known as a —

Why is the Network Interface Card (NIC) almost obsolete nowadays?

Consider the following statements about network devices: Which of the following is correct?

Network topology refers to —

The connecting points of each computer or peripheral device in a network are called —

In bus topology, the central connection line where all nodes are connected is known as the —

How many terminators does a bus have in bus topology?

Which is an advantage of bus topology?

Which is a disadvantage of bus topology?

In ring topology, the computer devices are connected in a —

Which is an advantage of ring topology?

What happens in ring topology if one computer device in the network is disabled?

In star topology, devices are connected to each other with a central —

Which cables are generally used to construct star topology?

Which is a disadvantage of star topology?

In tree topology, different levels of computer devices are connected with a central —

Tree topology is also known as —

In tree topology, what happens if the root host server is disabled?

In mesh topology, every device in the network is —

The connection between computers in mesh topology is called —

Mesh topology is also known as a —

In a mesh topology with $n$ nodes, how many connections does each node need?

In a mesh topology with $n$ nodes, how many wires are needed?

Which sectors typically use mesh topology where data security and reliability are priorities?

Which topology is the internet based on?

Hybrid topology accompanies which topologies?

Consider the following statements about topologies: Which of the following is correct?

In a mesh topology network with 5 nodes, how many wires are needed (using $\frac{n(n-1)}{2}$)?

Cloud computing is best described as —

According to the text, cloud computing is —

Cloud computing can be categorized into how many types?

A cloud where a singular organization has ownership and control is a —

The cloud services open to the public on the internet is known as a —

Which companies provide public cloud services with their own infrastructure worldwide?

A hybrid cloud is the combination of —

The services provided by cloud computing organizations can be divided into how many types?

In which cloud model are service infrastructures (like virtual machines) rented out via the cloud?

Amazon's Elastic Computing Cloud (EC2) is a popular example of which model?

In which model are computing platforms (OS, development environment, databases) rented out as services?

Microsoft's Azure and Google's App Engine are prime examples of —

In which model do customers get access to the service application and its database without using their own storage?

Google Drive and Dropbox are popular examples of which model?

In which model do customers rent network services (like WAN and SVPN) from a cloud vendor?

Which cloud benefit means customers do not pay in advance and pay according to the amount of service used?

What is a sensitive risk attached to cloud computing?

Consider the following statements about cloud service models: Which of the following is correct?

What is the unit of data transfer?

A group SMS is —

Which device can perform data filtering?

Consider the following about bit synchronisation: Which is true?

The purpose of a computer network is — consider the following: Which one is true?

One day Humaira's father gave a print command from his computer and another officer in the same room printed from the same printer; the father also talked with an officer out of the country. The networks described in the passage are — i. LAN ii. WAN iii. MAN. Which one is true?

In a system where multiple officers print from one shared printer over a network and one communicates with another officer out of the country, one can have — i. More services from a small device ii. Easy communication with clients iii. Limited work in a small area. Which one is true?

A plan was undertaken to connect all of the laptops in the same room. What network will be used?

A plan was undertaken to connect all of the laptops in the same room. How will the laptops be connected? Consider — i. Cable ii. Client-server iii. Wifi. Which one is true?

Kamal Reza established a network connection between computers to communicate with different branches of his office inside Dhaka. What is the network used here?

Kamal Reza, having a network across office branches inside Dhaka, decided to change the communication medium to improve data transfer speed. What will be the repercussions of his decision?

College Y has three separate buildings (Humanities, Business Studies, Science), each with its own computer network, and the Principal wants to merge all departments under a single network. What is the current network system of each individual department in college Y?

College Y wants to merge three department LANs in buildings located far away into one network where cable connections are not an option. Which network system should be used to connect these distant LANs?

What is bandwidth?

What is Modulation (as in Modem)?

Shawpna shared a file with colleague Arif on another floor; both could send and receive simultaneously. What is full duplex?